NotificationVerb (Enum)
enum NotificationVerb {
COMMENT_CREATED
COMMENT_DELETED
COMMENT_UPDATED
EVENT_CREATED
EVENT_DELETED
EVENT_REGISTRATION_CANCELED
EVENT_REGISTRATION_CREATED
EVENT_REMINDER_CREATED
EVENT_UPDATED
JOIN_REQUEST_STATUS_UPDATED
MEMBER_MENTIONED
MESSAGE_CREATED
POST_CREATED
POST_DELETED
POST_UPDATED
REACTION_CREATED
}